Articles by Keyword: Spatial Autocorrelation

Search results for Spatial Autocorrelation

We found 56 results for you
  1. Spatial genetic pattern in an economically beneficial insect, the cyclical African wild silk moth (<em>Gonometa postica</em>)

    Spatial genetic pattern in an economically beneficial insect, the cyclical African wild silk moth (<em>Gonometa postica</em>)

    Item type: Journal Article • Journal: African Zoology
    The African wild silk moth (Gonometa postica) exhibits large inter-annual population size fluctuations in the Kalahari region of southern Africa. Spent cocoons from this species are currently being utilized in a local silk industry. An understanding of the recolonization dynamics...
  2. Spatial distribution of male display sites in a North African population of Houbara Bustard <em>Chlamydotis undulata undulata</em><xref ref-type="fn" rid="FN0000"/>

    Spatial distribution of male display sites in a North African population of Houbara Bustard <em>Chlamydotis undulata undulata</em><xref ref-type="fn" rid="FN0000"/>

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Understanding the effect of habitat characteristics on the distribution of threatened species are fundamental in conservation planning and management. Here, we explore the spatial distribution pattern of display site by the North African Houbara Bustard Chlamydotis undulata undulata males. For...
  3. Spatial considerations when monitoring reef fishes

    Spatial considerations when monitoring reef fishes

    Item type: Journal Article • Journal: African Journal of Marine Science
    Spatial dependence can obscure relationships between response and explanatory variables because of structuring within the residuals reducing variance and biasing coefficient estimates. Here, we highlight the influence of the spatial component, in the presence of spatial dependence, on abundance trends...
  4. Quantitative description of woody plant communities: Part I. An approach

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Various descriptive units for woody plant communities are proposed. These are the Evapotranspiration Tree Equivalent (ETTE), Browse Tree Equivalent (BTE) and Canopied Subhabitat Index (CSI), which describe the status of a woody community in terms of potential moisture use, value...
  5. Quantitative description of woody plant communities: Part II. Computerized calculation procedures

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Calculation procedures for various quantitative descriptive unit‐values are described. These procedures are divided into primary and secondary calculations. The former is then divided into the calculation of spatial tree volume and preliminary calculations regarding the complete quantitative description. The latter...
  6. Spatial variability of two selected soil properties in a semi- arid subcatchment of the Lower Great Fish River

    Spatial variability of two selected soil properties in a semi- arid subcatchment of the Lower Great Fish River

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The variability of the soluble salt content and the textural composition of the soil were investigated in a 28-ha sub-catchment of the Ecca River, a tributary of the Great Fish River. The frequency distribution of the soluble salts in the...
  7. Variations in floristic and palatability composition, yield of veld and of soil characteristics on a paddock scale

    Variations in floristic and palatability composition, yield of veld and of soil characteristics on a paddock scale

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Five parallel 900-m line-transects were laid out 100 m apart in relatively homogeneous veld. Floristic composition, yields of dry matter, soil forms and series, effective depth, clay content of the top and subsoil, and the pH of the topsoil were...
  8. Characterizing the hydraulic properties of a semi-arid catchment by means of sorptivity measurements and scaling theory

    Characterizing the hydraulic properties of a semi-arid catchment by means of sorptivity measurements and scaling theory

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The variability of soil sorptivity within a semi-arid catchment was investigated on a macro- (28 ha) and microscale (16 m2). In the macroscale study, sorptivity was measured at 176 sites using a falling hydraulic head technique. The mean sorptivity of...
  9. Recognition of natural soil bodies using textural properties of red freely drained soil profiles from KwaZulu-Natal and Mpumalanga

    Recognition of natural soil bodies using textural properties of red freely drained soil profiles from KwaZulu-Natal and Mpumalanga

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The research examines the range of variation of soil texture for red freely drained soils associated with six of the major geological formations of KwaZulu-Natal and Mpumalanga. The soil profile information is derived from particle size analyses of over 4...
  10. Temporal and spatial relations of plant element uptake and yield of a lucerne stand

    Temporal and spatial relations of plant element uptake and yield of a lucerne stand

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    In general, agricultural fields are managed as uniform units, ignoring spatial and temporal relations between plant element uptake and yield. This study was conducted from June 2001 to February 2002 on a two-year-old lucerne stand and explores the spatial relationships...